Do we think they genuinely believe their Disney, child-centric content isn't aimed at kids? Even the majority of this forum I imagine have discovered the Inghams through child viewers one way or another.
I found the Inghams through JessFam. When I was 14/15 I was obsessed with teen pregnancy channels, this was around the time Jess was 17 and pregnant with her first child. I totally idolised Jess and desperately wanted to become a mother as soon as possible- I was a very, very unhappy, friendless 14/15 year old and truly believed having a baby depend on me would fill the emptiness I felt. Thankfully we lived very rurally at the time and I was at an all-girls school, or I honestly believe I would have been pregnant by the time I was 16. (And this would come as a total shock to my parents who still have no idea ten years on, which is an argument for youtube kids in itself!). I finally saw the light around the time Jess was pregnant with the twins, but I carried on following the ytmommadrama threads and eventually commented on there. Someone recommended the Inghams to me as an alternative channel to watch- this would have been when I was 19ish. I know it was circa 2015 because the poster recommending the Inghams did so on the basis that they were a nice, normal, non-youtube fame focused family channel who didn't do excessive gifts
I was legally an adult at this point. I watched one Ingham video, thought the dad was a bit of a creep but couldn't really explain why, switched off and didn't think about them again until the non-situation happened. But had I been a few years younger and more naive I could easily have been one of Creepy's towel models. The point is that even though I was an adult when I first watched them, I discovered them and I'm here now because of similar content I was watching as a child. There must be plenty of kids who discover them in a similar way and are young and naive enough to get sucked in.
Whether Creepy and Lazy think they're a suitable channel for exclusively child viewers is irrelevant. What matters is who their majority audience is. And I bet you anything it's kids.